Period 1917-1925
Some 150 letters by in Soviet Russia to his wife and daughters abroad 1917-1925 and n.d.; handwritten notes on Soviet foreign policy, etc. c. 1921-1925; personal documents c. 1880-1925; typescript of 'Memoirs of an old Revolutionist' by 1931.

Period 1917-1942
Typescript of six chapters not included in the printed edition of the first part of his memoirs `Stranicy iz moej zizni' 1944; typescript of the second part of his memoirs covering c. 1910-1933 (photocopy); a few letters from 1923-1942 and personal documents; articles by and concerning Krol'; printe...